Stereoscopic viewer and photographic film for same



Patented Ms 17,1938

STEREOSCOPIO VIEWER AND PHOTG- GRAPHIC FOR SAME sari Rossman; New York, N. Y.,' assignor to Novelvlew, Inc., New York, N. Y., a corporation 'of New York Application August 10, 1935, Serial No. 35,556

" 2 Claims. (01. 88- 31) gear 8 of sixteen teeth 9 adapted to engage and This inventionrelates to hand-held stereoscopic viewers .of the type wherein here is utilized a perforated film tape having erealong a series of pairs of stereoscopic images. The viewing de- 5 vice embodies a pair of binoculars and windows,,

and the film is threaded through a framing of the device to bring said images in registry with the windows.

One of the objects of the invention is to proi vide an economically manufacturable'and salable,

efiiciently utilizable and operable,'and improved device wherewith to view stereoscopic pictures upon a film tape.

Another object is to provide a. device of the 1 above type having improved means for propelling p and resting said film tape while viewing the pictures. r

A further object is to provide a device ofthe above type having means for propelling and rest- 20 ing the film tape in either of opposite directions,"

- soas to readily and conveniently select I any picture along-the film for viewing.

A further object is to provide a device 'of the said type with improved means for positively 25 registering any complementary pair of the images with said windows. A still further object is to provide a device and film offthis type with means to automatically produce, registration of the leading complemen- 30 tary pair of the images with said windows upon the threading of the leading end of .the film.

through the device. v

Other objects and advantages will hereinafter appear. j 35 In the accompanying drawing,--

Fig. 1 shows a plan view of the stereoscopic viewer of this invention.

Fig. 2 is a cross-sectional elevation of the viewing device shown in Fig. 1, on line 22 40 Fig. 3 is" a transverse-sectional side elevation of the viewing device shown in Fig. 2, on line 3-3.

A 'Fig. 4 is a cross-sectional plan view showing a detail of the viewing device.

Fig. 51s a plan view, of a stereoscopic image film of this invention.

, The film I, rug. .5, is preferably 01' standard cinematic dimensions, with standard perforations 2, and hasprinted therealong a plurality of photographic complementary pairs of stereoscopic I 50 images A, B, C, as shown. The viewing device 3 is-provided' with a framing 4 for receiving the film I, binoculars 5 project from said framing,

and windows 6 are formed in said framing op-. posite to the said'binoculars. In the hubbed por- 65 tion I of the framing 4 is rotatably mounteda mesh with the perforations 2 of the film, serving as a rack. Thegear 8 is keyed upon an axle l0 1. journaled in the hub l and terminating in a knurled finger-knob II. The framing 4 for guiding the film consists of a bottom plate l2 anda plate l3 thereover, which is provided with rounded edges l4 at its ends and atthe window-openings 6 to'facilitate threading of the film through the framing. The window-openings in plate 12 are preferably rabbeted as shown andfilled with suitable panes i5 of translucent light dispersing material. Between the gear 8 and the wall of hub 1 is located a yieldable spring plate It having at pair of projections l1, which continually 15 bear pressingly against the gear, Figs. 3, 4, there thus being one suchprojection for each eight 1 teeth of the gear, and the latter is provided with a pair of openings l8 adapted to receive and reg-. isterwith said projections when the gear is turned to bringthe openings into alignment with the projections. Due to this mechanism, the gear 8 is capable of rotating freely during a fractional revolution thereof equal toa peripheral extent -of eight of its-teeth, but will be yieldingly ar- 2 rested between said fractional turns. 7 When the film l is propelled through the fram ing 4 any pair ofits complementary images A, B,

C may be brought into registry with the windows 6 andthe stereoscopic pictures thus viewed. The

image areas are so arranged upon the film that between the units comprising each complementary pair thereof are located two similar areas belongingto .difierent pairs of images, and it is required that the film be advanced to a distance of two of the areas in order to bring the succeeding picture to view. At each of the images is formed a multiple of-fourperforations 2 comprising the continuity of the perforation-rack, as shown, and as each peripheral portion of gear 8, 40 between its openings l8, includes eight teeth the free fractional'turns of the gear will advance the film to bring complementary pairs ofthe images in registry with windows 6, and will yieldingly arrest the pictures when the openings l8 of gear I come into engagement with the projections l1 oi spring-plate l6. Continuing the rotation .of the gear 8 in either direction, therefore, will bring toview any pair of "its stereoscopic images, which may be left stationary for viewing at the yield- 'i'nglv arrested position of thev gear, and the film pair of images into registry with the windows 6 at each engagement of the holes I! with the projections I], provided any one pair of the images has been initially in such registry while said openings and projections were in engagement. 1 4

As shown in Fig. 5, the initial end of the film I is provided with a marginal portion l9 between the edge 20 of the first image area 2| and the terminal edge 22 of the film, and the distancebetween edge 22 and the last perforation 23 is alsopredeterminately fixed. When it is desired to enter the leading perforation 23 and thereby enmeshes the gear with the film.: The continued forward feeding of the film and resulting rotation of gear 8 causes the initial complementary images 2|, 25 to register with the windows 6 upon the first,click or engagement of the openings l8 with the projections l1, and the automatic registering of all the other stereoscopic pictures of the film with the windows is thereby effected upon the arresting periods of gear 8 or resting periods of the film, whether the latter is fed by turning the knob H or drawing at either end of the film, to view the pictures successively or selectively in either direction.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my inventionfl claimt- 1.. A viewing device with a perforated film tape therefor having thereupon a series of ocularly spaced complementary stereoscopic images, the

device including binoculars with ocularly spacedwindows for registering with said images, the device being adapted for threading the film therethrough, a toothed gear rotatably'mounted in the device for meshing with the film perforations,-

means to arrest the rotation of said gear at peripheral distances equal to the distances required to advance the filmto bring succeeding complementary stereoscopic images into registry with said windows, said film being provided with a predetermined terminal edge at such distance from the leading perforation thereof that when threaded through the device said edge will actuate one tooth of the gear to cause the succeeding tooth to enmesh with said leading perforation, and. said predetermined edge being also at such distance from its leading pair of stereoscopic images that when enmeshing the film with the gear'while it is in said arrested position it will bring, the leading pair of complementary images in registery with said windows upon the succeeding arrested position of the gear.

2. A viewing device with a perforated film tape therefor having thereupon a series of ocularly spaced complementary stereoscopic images, the device including binoculars with ociflarly spaced windows for registering with said images, the device being adapted for threading the film therethrough, a toothed gear rotatably mounted in the devicefor meshing with the film perforations, means to arrest the rotation of said gear'at peripheral distances equal to the distances required to advance the film to'bring succeeding complementary stereoscopic images into registry with said windows, and said film being provided with a predetermined terminal edge at such distance from its leading pair of stereoscopic images that I when threaded through the device and enmeshing the film with the gear while it is in said ar rested position it will bring the leading pair of complementary images in registry with said windows upon the succeeding arrested position of the gear.

, EABLROSSMAN. 

